Coil transferring machine



July 13, 1965 H. w. MOORE.

COIL TRANSFERRING MACHINE 6 Sheets-Sheet 2 Original Filed Sept. 2:, 1960July 13, 1965 H. w. MOORE 3,193,913

con TRANSFERRING MACHINE Original Filed Sept. 2:, 1960 6 Sheets-Sheet 3llllllll llllh '1 LIIINIW/(l/l/A July 13, 1965 H. w. MOORE COILTRANSFERRING MACHINE Original Filed Sept. 2:, 1960 6 Sheets-Sheet 4INVENTOR. #422) m M0026 BY 2 V ,2, Z

July 13, 1965 H. w. MOORE COIL TRANSFERRING MACHINE Original Filed Sept.2 1960 6 Sheets-Sheet 5 INVENTOR. ##PZ M M0025 July 13, 1965 H. w. MOORE3,193,913

COIL TRANSFERRING MACHINE Original Filed Sept. 2;, 1960 6 Sheets-SheetINVENTOR. HHEE Y M M0055 HIS HTTOEA/EYS United States Patent 3,193,913CQHL TRANSFERRENG MAQHINE Harry W. Moore, l51 Kittridge Road, Dayton,@hio ()rlginal application Sept. 2, 196%, Ser. No. 53,801, new PatentNo. 3,137,931, dated .l'une 23, 1964. Divided and this application Mar.23, 964, Ser. No. 363,659

2 (Ilairns. (til. 29-ll555 This application is a division of mycopending tion Serial No. 53,801, filed September 2, i960, CoilTransferring Machine.

This invention relates to a machine for inserting coils from a dummyrotor or stator into slots in a field carrying member of adynamoelectric device.

In one method of automatically winding coils in an annular fieldcarrying member, such as a stator, the windings are first wound on adummy field member. The dummy member is then placed centrally of thestator and the windings are removed from the dummy member and insertedinto the stator slots. The mechanism for inserting the windings in thestator slots often is incorporated within the dummy member. However,such mechanisms are usually quite complicated and expensive in thatseveral moving parts must be accurately positioned within thecomparatively small confines of the dummy member.

In the past, various mechanisms separate from the dummy member have alsobeen devised for transferring coils to stator slots. These, too, havenot been altogether satisfactory. Often they must be manually reset oradjusted before each transferring operation, and the dummy member mustbe manually locked or loaded in position. any manual operation, ofcourse, reduces the speed with which the coils may be transferred.

The primary object of this invention is to provide an improved methodfor rapidly transferring coils deposited on a dummy member to a fieldcarrying member of a dynamoelectric device.

Another object of this invention is to provide a coil transferringmechanism which is automatically reset after each transferringoperation.

In my copending application, Serial No. 48,ll8l, filed August 8, 1950,now Patent No. 3,156,268 entitled Coil Winding Mechanism, a machine isdescribed for simultaneously loading or depositing coils on a pluralityof dummy rotors or stators which are mounted on a single arbor formingwhat may be termed a mandrel or coil accumulator structure. Each dummymember is provided with the coils required for a single phase'winding ofa field member to be used in a polyphase device. There are as many dummymembers as there are phases, so that the accumulator structureaccommodates all of the coils required for the polyphase field member.It is advantageous to transfer these coils to the stator slots by meansof a single transfer meChanis.

Therefore, another object of this invention is to provide a method forinserting coils into the field member or" a dynamoelectric device from asingle accumulator structure having a plurality of dummy members mountedthereon. The xethod of this invention has been designed primarily foruse with the mandrel or accumulator structure mentioned above. However,the method may be used with other dummy structures.

Other objects and advantages will become apparent from the followingdescription.

Referring to the drawings:

FIGURE 1 is a front elevational view of a coil transferring machine madein accordance with this invention with a dummy member and a fieldcarrying member in position to receive coils from the dummy member.Portions of the machine are broken away to more fully illustrate detailsthereof.

applicaentitled FIGURE 2 is a rear elevational view of the coiltransferring machine of this invention.

FIGURE 3 is a perspective view of a portion of a dummy member mounted onan arbor alon with a portion of a tong structure used for removing coilstherefrom.

FIGURE 4 is a diagrammatic perspective view showing a mandrel oraccumulator structure and stator frame in three different stages ofoperation of the transferring machine.

FIGURE 5 is a partial sectional view of the coil transferring machine,taken along ines 55 of FIGURE 1, showing the position of the machineelements as it begins its initial operation.

FIGURE 6, 7, 8, 9, 10, ll, l2, l3 and 14 are sectional views similar toFlGURE 5 illustrating the sequence of operation of the machine of thisinvention. In FIGURE 9, a larger portion of the machine is shown. Alsoin FIGURE 9, an air cylinder is in section to disclose details thereof.

FEGURE 15 is a sectional View taken along lines of PTGURE 9,illustrating the manner of engagement of the tongs with the dummymember.

FIGURE to is a sectional view, taken along lines l6l6 or" FIGURE 15, ofa portion of one of the tong arms.

FIGURE 17 is a diagrammatic view illustrating the manner in which thetransferring mechanism and the arbor of an accumulator structure aresupported.

FEGURE 18 is an elevational view or" a stator which has been providedwith coils by a mechanism made in accordance with this invention.

Referring to FIGURE 18, which shows a ring shaped field member 2d(hereinafter called a stator frame) having thirty-six radially inwardlydirected slots 22, the coils for a twelve pole, three phase motor may bearranged as follows.

Six coils C form the first phase. These lie in the bottom of equallyspaced pairs of slots. Thus, each coil C straddles two slots and isseparated from the immediately adiacent coils C by two slots. Six coilsC form the second phase windings. These are similarly equally spacedabout the circumference of the stator. However, these coils must bedisplaced by electrical degrees, i.e., 2 mechanical degrees, from thefirst phase coils. Since there are 36 slots, the distance between slotsis 10. Accordingly, the ends of the coils C are deposited at distance oftwo slots away from the ends of the coils 0,. Therefore, one end of eachcoil C overlies a portion of a coil C while the other end of each coi Clies in the bottom of a slot 22. Six coils C forming the third phase,are then deposited such that their ends are displaced by 240 electricaldegrees from the ends of the C coils. This involves a shift in positionof 40 mechanical degrees from the C coils. Accordingly, one end of eachcoil C overlies a coil C while the other end overlies a coil C Ratherthan winding the coils C C and C directly on the stator frame 20, thecoils are first deposited on a plurality of dummy members 24 (seeFIGURES 3 and 4), there being one member 24 for each phase. Thus, forwinding the twelve pole, three phase stator described above, threecylindrical dummy members 24a, 24b and 24c are fixedly mounted on acommon arbor 2s by means of keys Each dummy member has sixcoil-receiving portions 3% equally spaced about its periphery. Thecoilreceiving portions 35 on each of the members 24a, 24b and 24c arealigned one behind the other. Each coilreceiving portion 39 is definedon its sides by a pair of parallel coil-retaining slots 32, each pair ofparallel slots 32. being parallel to the radius extending between theslot pair. The coils C are deposited in the member 24a, the coils C inthe member 24b and the coils C in the member 24c. The center of eachportion 30 is cut out to form portion 30, the top surface of the coilcams the blocking plate out of position. Thus, while the blocking platesare biased to hold the coils within the slots 32, the plates may easilybe pivoted to open theslots when it is desired to remove the coils.

To load the stator frame 20 with coils, any one of the d fate. The fieldmember 2% is loosely clamped in position on the retaining ring bymeansof a plurality of clamps 74. One clamp 74 is mounted on each of theinner brackets 56. All of the clamps 74 are identical; therefore, onlyone is shown in the drawings and only one need be described. As shown inFIGURES 5 and 6, each clamp 74 comprises a right-angled clamp arm 76having a generally horizontal arm portion '78 pivoted to a yoke orbracket 80. mounted on both the internal face of the rear disc 52 and onits mounting bracket 56. The arm portion 78 is recessed to provide acrescent-shaped channel or recess 82 for receiving a clamp actuating bar84 which is slidably mounted upon the bracket 56. The actuating bar 84is driven by a clamp actuating cylinder 86 mounted on thefront dummymembers may be placed within the frame 2% so that the outer periphery ofthe dummy member is contiguous to the inner periphery of the statorframe and the pairs of coil-retaining slots 32 in the dummy membercommunicate with pairs of slots 22 in the field member. The coilsdeposited in the slots 32 are then lifted radially outwardly andinserted in the stator slots. While this could be performed manually,the operation would be costly and time consuming. In accordance withthis invention, a coil inserting machine 42 has been devised whereby thecoils may be removed from the dummy mem:

her and inserted into the field member slots in amatter of seconds.

In the specific example illustrated in the drawings, there are sixbrackets 54. 'Accordingly, the brackets are spaced by 60. The innerbrackets, which are nearer the axis of the frame than the outerbrackets, are likewise equally circumferentially spaced by 60. However,each inner bracket 56 is located between a pair of outer brackets 54,

for reasons which will later be made apparent.

The frame plates 5t and 52 are identical in size and shape. Each isdisc-shaped and each has a central aperture 58, whereby a stator frame2t and an accumulator structure may be supported therebetween. The meansfor The frame 44 comprises a forward annular supporting the stator framecomprises a retaining ring (FIGURES 1, 2 and 5) located centrally of theframe 44- so as to lie nearly midway between the plates 5%, 52 butcloser to the rear of the plate 52, with its forward face lyingsubstantially parallel to the plane of the plates and coaxially with theapertures 58-. The ring 6t? is, held in position by a plurality ofhorizontal spacer bars 62, only one of which is shown in the drawings.One end of each of the bars 62 is attached to a radially directed flange63 on the ring 69. (See FIGURE 1.) The other end is attached, as byscrews 64, to a stator indexing ring 66 which is rotatably mountedwithin an annular recess 68 in a ring-shaped mounting bracket 70attached to the outer face of the rear plate 52. The forward face of theretaining ring 69 is stepped so as to provide a bearing surface 72 whichis likewise parallel to the plane of the plates 50,

The stator 20 to be loaded with coils. is placedsubstantially midwaybetween the frame plates 56, 52 within the retaining ring 60. The sidefaces of the stator frame are provided with a plurality of equallyspaced lugs 73. The lugs 73 onithe rear face of the stator frame engagewithin cooperating recesses 75 in the bearing surface 72 so that, r

as will be described more fully later, as the retaining ring 60undergoes rotation, the field member will likewise r0.-

face of the forward disc 59 having a piston rod 88 connected to the bar84, so that, as the piston rod 88- is actuated, the bar 84 slides backand forth between the discs 50 and 52 along the bracket 56. When theretaining ring 6@ is empty, the piston rod 88 is extended so that theactuating bar 84 lies adjacent the bracket and Within the channelfiZ, asshown in FIGURE 5. A spring 90, which is engaged between the other,generally vertical, arm portion 92 of the clamp arm '76 and its adjacentmounting bracket 56, biases the arm 76 in a counterclockwise directionabout the bracket St? away from clamping engagement with the retainingring 60. After the stator frame 29 is placed into position against thebearing surface 72 as shown in FIGURE 6, the cylinder 86 is actuated toslide the actuating bar 84 toward the forward plate 50 whereby acamsurface Q4 provided forwardly on the bar 84 engages a cam 96 on theforward portion of the recess 82 to pivot it into a clamping position.The cam 96 is bifurcated to straddle the piston rod 88. The rear face ofthe generally vertical portion 92 is flanged at 98 to provide asupporting surface lltitl beneath the stator frame 20. The inner face ofthe arm portion 92 above the flange 98, indicated at 102 in FIGURES 5and 6, is spaced from the forward face of the stator frame by an amountslightly greater than the length of the lugs 73 extending forwardlytherefrom; Accordingly, the stator frame is permitted a slight freedomof movement, or play, even when clamped on the retainingring 60.

After the stator frame 20 has been clamped to the retaining ring 60;,asshown in FIGURE 6, the dummy member 24a, which is loaded with coils, ispositioned within the stator frame as shown in FIGURE 7. To move the'member 24a into the stator frame, the end of the arbor 26 nearest themember 24a is locked in a centering chuck 1G2 (FIGURE 17) which holdsthe arbor substantially' in the axis of the frame 46. The chuck Hi2forms a part of a tailstock 1M slidably mounted on a bed 106 provided on'top of the base 46. Any suitable drive mechanism, such as the cylinderand piston arrangement 163, may be used to adjust the position of thetailstock along the bed 106. Also, the tailstock may be accuratelylocked into any predetermined adjusted position by any suitable stopmechanism, suchas the hydraulically ac- V tuated clamp 11% shown inFIGURE 17. These parts may be conventional and form no part of theinstant invention except insofar as they provide means to move the accumulator structure axially through the coil inserting mechanism 42.Accordingly, a more detailed description of the tailstock is believedunnecessary.

When the arbor 26 is first clamped 'in the chuck, the tailstock 1% mayoccupy a position forwardly or to the 7 left of the position 104aindicated by phantom lines in FIGURE 17. The tailstock is then movedrearwardly to the position 104a wherein the dummy member 24a is movedaxially in the directionof the arrows in FIGURE 7 to be positionedconcentrically within the bore of the Since the accumulator is supportedat only one'end by the centering chuck 1&2, it may sometimes be out ofalignment. Accordingly, the leading peripheral edge 142 of each dummymember (as viewed in FEGURE 7) is beveled and provided with a pluralityof circumferentially spaced tapered guide pins 114 shown most clearly inFIGURE 3. Since the stator frame is loosely clamped within the ring 60,a small amount of relative movement may take place between the statorframe and the dummy member when the guide pins lid enter the statorframe. Accordingly, there is no danger of damage due to verticalmisalignment of the dummy member and the stator frame. To insure properalignment of the coil-receiving slots 32 in the dummy member with theslots 22 in the stator frame, the outer circumferential face 116 of eachof the members 24 are provided with keys 118, each of which engageswithin a slot 22 in the stator located between the slots to be providedwith coils. The pins 114 and the keys 118 may be integral with slugs 12%which are fit within recesses cut in the face 116.

After the dummy member 24:; is placed in the position indicated by fulllines in FIGURE 7, the coils deposited thereon are transferred andinserted into the stator slots 22 which communicate with the slots 32 inthe member 24a. This is accomplished by a plurality of radiallyextending tongs 122 mounted between the plates 50 and 52. Each of thetongs 122 includes a pair of tong arms 124 having a coil engagingportion comprising a lifting finger structure 126 attached to theirlower or radially innermost end portions. An intermediate portion ofeach arm 124 is pivotally attached to a radially inwardly extendingbifurcated bracket or yoke 12% disposed on the base of a compound, tongoperating air cylinder 13%. As shown in FIGURES through 8, a compressionspring 134, which encircles a transversely extending stud 136 mounted onthe side of each arm 124, normally causes the fingers 126 to beseparated sufiiciently to straddle the ring 66, stator frame 20 anddummy member 24a. To force the fingers 126 toward each other, a pair or"pistons 133 (FIGURE 9) are slidably mounted along a transverse pathparallel to the axis of the frame within the cylinder 13%). Each pistondrives a pin 14%, mounted on its outer end, which engages a radiallyoutwardly extending flange 144 integrally disposed on each arm 1% abovetheir pivot points. As is apparent, air may be introduced into thecylinder between the pistons 13% whereby the flanges 14 are separatedand the lower portions of the arms 124 are moved one toward the otherabout the pivots provided on the yoke 128.

As shown most clearly in FIGURES 3, 15 and 16, each finger structure 126includes a pair of parallel prongs I48 adapted to fit within thecoil-receiving slots 32 beneath the ends of the coil therein.Additionally, the finger structure 126 includes an inwardly directedlifting surface 15% adapted to engage beneath the side of a coil, suchas that illustrated in FIGURE 3, and between a pair of spacer bars 152mounted adjacent the slots 32. The spacer bars 152 introduce a gapbetween the side of the coil and the dummy member. The finger structureis also provided with slots 154 so as to straddle the spacer bars 152.With this arrangement, as shown in FIGURES 9 and 15, when the tong arms124 are moved one toward the other, the prongs 145 enter the slots 32beneath the ends of the coil and the surfaces 154) abut the side of theaccumulator beneath the sides of the coil. The fingers 125 will bedescribed in greater detail below.

The operation of one of the tongs is illustrated in FIG- URES 5 through12 and is as follows. The air cylinder 13% is mounted transversely on aradially extending and reciprocal piston rod 156 by means of a threadedcoupling between the top of the cylinder 13%? and the rod 156. Thepiston rod 156 is driven by a double-acting tong actuating cylinder 158mounted on one of the outer brackets 54. While the stator frame 26 andthe member 24a are moved into position within the ring 6%? as shown inFIG- 6 URES 5, 6 and 7, the tongs are held radially outwardly by thecylinder 153. As shown in FIGURES 1 and 8, the cylinder 153 is thenenergized to actuate the tongs radially inwardly toward the axis of theframe whereby the fingers 126 straddle the members 20 and 240. Next, asshown in FIGURES 9 and 15, air is supplied to the cylinder 134) betweenthe pistons 133 to separate the flanges 144 and cause the fingers 126 tomove one toward the other to interengage with the dummy member. Asdescribed earlier, the prongs 148 engage the ends of the coil C withinthe slots 32 and the surfaces 150 engage beneath the sides of the coilC. The cylinder 158 is then energized to withdraw the tongs from thedummy member 24a, as shown in FIGURE 10, thereby removing the coil Cfrom the dummy member and inserting it into a pair of Slots 22 in thestator frame 20. As stated earlier, when the coil is raised orwithdrawn, the top of the coil cams the blocking plates 36 out of theirblocking position. The insertion of the coil within the slots 22 is thuscompleted.

To insure that no damage is done to the coil by raising it too far, astop plate 160 is affixed, as by screws 161 (FIGURE 9), centrally of theinternal face of each plate 56, 52 adjacent the tong arms 124. After apredetermined radially outward movement of the piston 156, the uppersurface of each flange 144 engages the bottom of its adjacent plate res,whereupon continued outward movement of the tong structure is blocked.The air is then released from the cylinder 13d by a release mechanism(not shown) whereupon the compression spring 134%, as shown in FIGUREll, moves the fingers 126 outwardly out of engagement with the coil C.The tongs are then permitted to raise to their original startingposition, as shown in FIGURE 12.

Only one tong structure has been described but, as mentioned before,there are several tongs 122 equally circumferentially spaced between thediscs 5t 52, each of which lies on a line extending radially from theaxis of the frame. There are as many tong structures as there arecoil-receiving portions on the accumulator. In the exam ple disclosed,the dummy members are provided with six coil-receiving portions.Accordingly, there are six tong structures. Of course, there are alsosix mechanisms for controlling the operation of the tongs. That is, thecylinders 130, 158 and the pairs of stop plates 16%) are duplicared foreach of the tongs. The clamps 74 lie midway between adjacent tongstructures. Therefore, there are six clamps 74. As shown in FIGURES 1and 2, the sides of the tong fingers 126 slope radially inwardly. Thus,each of the fingers 126 may occupy their innermost position at the sametime. Since, in addition the tongs 122 are located on circumferent-iallyspaced radial lines, they may be simultaneously moved radially inwardlyand all of the coils on the member 24a may be simultaneously insertedinto the coil-receiving slots 22 in a matter of seconds.

The coils formerly positioned on the dummy member 24a are thusaccurately positioned within the stator slots. Normally, the coils willstay in position until suitable means, such as wedges (not shown) arepositioned with the slots to hold the coils in place. However, wherethere are a comparatively large number of turns of wires in each coil,the coils may tend to unravel or slide out of the slots. To preventunraveling, the central portions of the coils may be moved outwardly bya greater distance than their ends. Thus each of the coils are somewhatarcuate as shown in FIGURE 18. This causes the ends of the coils totightly engage the sides of the teeth separat ing the slots 22. Thearcuate configuration of the coils is obtained by the specialconstruction of the fingers 126. Referring again to FIGURES 3 and 16,each finger 126 is made in two parts. The lifting surface 150 ismachined on the lower portion of its arm 124- and is the top surface ofa boss 176 abutting from the front side of the arm 124. The lowerportion of the arm also is provided with a transverse aperture 172. Theprongs 143 are connected by a transverse bar 174extending therebetweenand beneath the. boss 171 The prongs are pivotally attached to the arm124 by a dowel-pin 176 which extends through an aperture 178 in eachprong and through the aperture 172 in the arm llfi. The pin 176 islocked within the aligned apertures 172 and-178by means of a set screw189. With this arrangement, the prongs may pivot about the dowel pin 176in a counterclockwise direction until the rear face 182 of the bar 174engages the forward face of the arm 126, andin 'a clockwise directionuntil the. top face 184 of the bar 174 engages the bottornsurface of theboss 17%. A spring 186,-which is housed within a recess provided in thelower face of the boss 179 and engaged with the top face184 of the bar174 biases the prongs 148 in a clockwise direction so that the uppersurfaces of theprongs are normally lower than the lifting surface 150.However, the bottom surface 188 of the bar 184 is sloped to provide acam which engages the base portions 199 of the slots 32. Therefore, whenthe prongs 148 are inserted into the slots 32, they are cammed upw-ardlyso that the upper surface of the prongs 148 and the'surface 150 aresubstantially coplanar. As the arms 124 are raised from the positionshown in FIGURE 9 to that shown in FIGURE 10, the prongs 148 areelevated out of engagement with the base portions 190 whereupon thespring 186 biases the prongs downwardly so that their top surfaces liebeneath the plane of the surface 150. In this way, the finger-s may beinserted beneath the coil without difiiculty, yet the surface 159elevates the sides of the coils slightly above that of the ends elevatedby the prongs 148 for the reasons discussed above. 1 7

Since all of the coils mounted upon the'member 24a are intended to beused in a single phase of the winding of the stator, they are connectedby lead-in wires 192 (FIG- URE 1). In order to raise the lead-in wiresalong with After all of the coils forming the first phase of the Istator winding are inserted into the slots '22, the empty dummy member2411 is then moved out of engagement withthe stator frame 20 in thedirection of the arrows in FIGURE 13. Next, the dummy member 24:; ismoved into position within the bore of the stator frame by movement ofthe tail stock to the position 10411 illustrated in FIGURE 17. Prior toinsertion of the member 2411 into the stator frame 21), the frame. andthe dummy member must be relatively rotated or indexed by 20 so that thecoils wound on the dummy member 24b when transferred to the stator frame20 will be displaced by 20 with respect to the first phase coilspreviously inserted in the slots. In the presently preferred embodiment,the stator frame is rotated or indexed by a mechanism, shown best inFIGURES 2 and 9, including a conventional com pound, double-acting aircylinder 2011. The indexing cylinder 2% drives a first piston rod 202having a link 204 fixedly mounted on its upper end. The link 204 ispivotally attached to.a mounting bracket 206 mounted on the. rearwardframe plate 52. A second piston rod 2&8 is slidably mounted within thebase of the cylinder 200 and is provided with a link 210, which may beidentical to the link 2134. The link 210 is pivotally mounted on abracket 212 which is fixedly attached to the indexing ring 61) by screws213 or the like. The cylinder 2110 is provided with airthrough an airline 214 attached thereto which may be slidably clamped to the bracket2116 by means of an'apertured retaining plate 216'. When fluid isintroduced into the cylinder 2121} through the line 214, it movesrelative to the first, fixed piston rod 202 from the position shown infull lines to that shown by dotted lines 260a in FIGURE 2. At thispoint, the second piston rod 268 has not been actuated. Movement of theE cylinder 2% moves the bracket 21 2 to the position indicated at 21212,thus causing the indexing ring to rotate within the recess 68 by 7 Sincethe ring 66 is connected withthe retaining ring 60 by means of thespacer bars 62, the ring 61) also rotates.

Thus, when fluid is first introduced into the cylinder 201), theretaining ring 60 and accordingly the stator frame 2% will be rotated bya predetermined amount, in this case by 20, as indicated by the lines218a, 2181) in FIG- URE 4. The dummy member 24b may then be positionedwithin the stator frame 20. The operation of the tongs 122 asdescribedabove with reference to the coils C forming the first phase isthen repeated for the second phase coils C deposited on the dummy member2412.

Subsequently, the dummy member 24b is removed from engagement with thestator frame by movement of the 'tailstock from position 1114b towardthe position 104a.

Before the dummy member 24c is placed within'the stator frame, however,the cylinder 200 is supplied with more positioned vwithin the statorframe.

air whereupon the second piston rod 208 is actuated to move the bracket212into the position 212a shown in FIGURE 2. The stator'is accordinglyindexed by another 20 as indicated by the lines 2181) and 2180 in FIG-URE 4. Movement of the tailstock is continued until it reaches'theposition 1040 wherein the member 24c is The operation of the tongs 12 2is again repeated so as to insert tl'lO'COllS forming the third phaseinto the stator slots 22 whereupon the stator frame is completelyprovided with coils as shown in FIGURE 18. The cylinder 200 may then beenergized to return the retaining ring to its original position. Notethat'the spa'cer bars 62 are positioned so as to move in an are betweenthe tongs 122,; as indicated by the position of one of the flanges 63 at63a, 63b and 630 in FIGURE 1. Thus, the tongs do not interfere with theindexing of the stator.

After all of the coils on the mandrel or accumulator have beentransferred to the stator frame, the tailstock 194 is moved by cylinder108 to its rearmost position shown in full lines in FIGURE 17 and themandrel is removed. The cylinder then returns the tailstock to itsinitial position. At the same time, the cylinders 86 are actuated toreturn the actuating bars 84to their position adjacent the yoke orbracket 80 whereby the springs 90 move the clamps 74 out of clampingengagement with the stator frame. The stator loaded with coils may thenbe removed from the stator retaining ring 61 in the direction of thearrows in FIGURE 14. Note that the position of the parts of theinserting mechanism in FIGURE 14 are identical to that shown in FIGURE5. Accordingly, the machine is in condition to receive another field sothat the dummy members are easily positioned within the stator. .Also,with this construction, additional accumulators may be rapidly movedinto position on the transferring machine without interference from theempty accumulators. Since all of the mechanisms for transferring/thecoils are operated by air or hydraulic cylinders and since all of thecoils for all of the phases may be initially mounted upon a commonarbor, the operation of the mechanism may be made completely automaticby suitable circuitry (not shown) which selectively and intermittentlycontrols the clamp actuating cylinder 86, the

tong operating cylinders 130, 158, the tailstock actuating cylinder 1118and the indexing cylinder 200. Circuitry for selectively andintermittently controlling the cylinders can beprovided in anyconventional manner. Accordingly, it is believed unnecessary to explainsuch circuitry in this application. l

While the mechanism described above is designed to transfer six coilsfrom each of three dummy members into a stator frame, the sameprinciples and the same basic structure can be used for transferring agreater or lesser number of coils for various types of dynamoelectricdevices. Also the mechanism could be used with different mandrel oraccumulator structures. While the terms stator and stator frame havebeen used extensively throughout the above description, these terms areexemplary only. It is apparent that the field member 20 could be arotor.

Although the presently preferred embodiment of the method has beendescribed, it will be understood that various changes may be made withinthe scope of the invention as defined in the appended claims.

Having thus described my invention, I claim:

1. The method of transferring coils into inwardly directedcoil-receiving slots of an annular field member of a polyphasedynamoelectric device, comprising the steps of: placing a dummy memberhaving coils forming one phase deposited in outwardly directedcoil-receiving slots therein within the bore of an annular field memberhaving inwardly directed coil-receiving slots with the outwardlydirected coil-receiving slots of said dummy member aligned with some ofsaid inwardly directed slots; transferring each of the coils from saiddummy member slots to said inwardly directed slots; removing said dummymember from within said field member; placing a dummy member havingcoils forming a second phase deposited in outwardly directedcoil-receiving slots therein within the bore of said field member withits outwardly directed slots aligned with at least some other of saidinwardly directed slots; transferring each of the second phase coilsfrom the last mentioned dummy member slots to the aligned inwardlydirected slots of said field member; removing said last mentioned dummymember from within said field member, and repeating the foregoingoperations as required to deposit the coils for all the phases in theslots of the field member.

2. The method of claim 1 wherein a plurality of dummy members aremounted on a common arbor and further including the steps of rotatingsaid field member relative to said dummy members after the coils forsaid one phase have been transferred to the field member slots andfurther rotating said field member relative to said dummy members aftereach subsequent coil transfer step.

References Cited by the Examiner UNITED STATES PATENTS 1,257,193 2/18Currie -'-92.1 2,836,204 5/58 Mason 140-921 2,934,099 4/60 Mason 14092.1

WHITMORE A. WILTZ, Primary Examiner.

JOHN F. CAMPBELL, Examiner.

1. THE METHOD OF TRANSFERRING COILS INTO INWARDLY DIRECTEDCOIL-RECEIVING SLOTS OF AN ANNULAR FIELD MEMBER OF A POLYPHASEDYNAMOELECTRIC DEVICE, COMPRISING THE STEPS OF: PLACING A DUMMY MEMBERHAVING COILS FORMING ONE PHASE DEPOSITED IN OUTWARDLY DIRECTEDCOIL-RECEIVING SLOTS THEREIN WITHIN THE BORE OF AN ANNULAR FIELD MEMBERHAVING INWARDLY DIRECTED COIL-RECEIVING SLOTS WITH THE OUTWARDLYDIRECTED COIL-RECEIVING SLOTS OF SAID DUMMY MEMBER ALIGNED WITH SOME OFSAID INWARDLY DIRECTED SLOTS; TRANSFERRING EACH OF THE COILS FROM SAIDDUMMY MEMBER SLOTS TO SAID INWARDLY DIRECTED SLOTS; REMOVING SAID DUMMYMEMBER FROM WITHIN SAID FIELD MEMBER; PLACING A DUMMY MEMBER HAVINGCOILS FORMING A SECOND PHASE DEPOSITED IN OUTWARDLY DIRECTEDCOIL-RECEIVING SLOTS THEREIN WITHIN THE BORE OF SAID FIELD MEMBER WITHITS OUTWARDLY DIRECTED SLOTS ALIGNED WITH AT LEAST SOME OTHER OF SAIDINWARDLY DIRECTED SLOTS; TRANSFERRING EACH OF THE SECOND PHASE COILSFROM THE LAST MENTIONED DUMMY MEMBER SLOTS TO THE ALIGNED INWARDLYDIRECTED SLOTS OF SAID FIELD MEMBER; REMOVING SAID LAST MENTIONED DUMMYMEMBER FROM WITHIN SAID FIELD MEMBER, AND REPEATING THE FOREGOINGOPERATIONS AS REQUIRED TO DEPOSIT THE COILS FOR ALL THE PHASES IN THESLOTS OF THE FIELD MEMBER.